Homebrew [Question] Latest FBI (1.4.12) doesn't return the AM Service error.

[Deleted User]

I dunno whether I'm pointing out something completely obvious, but the latest FBI version doesn't return the AM service error anymore, but instead returns a MODULE_NN_OS error.

Spoiler: 1.4.12 (MODULE_NN_OS) Error Message

Install failed!
BigBlueMenu.cia
Source: SOURCE_APP_BEGIN_INSTALL (0x5)
Module: MODULE_NN_OS (0x6)
Level: LEVEL_PERMANENT (0x1b)
Summary: SUMMARY_WRONG_ARGUMENT (0x8)
Description: <unknown> (0x2f)
Press Start to continue.

Spoiler: 1.4.9 (AM) Error Message

Install failed!
Couldn't initialize AM service.
Press Start to continue.

I know that FBI has recently migrated to citrus, so the code execution order may have been swapped around (NN_OS module may take place before AM (I'll check this, soon)).

To conclude my workings out, I'll provide some evidence:

This has all been tested out on a 9.9 Sysnand New 3DS.

 

[BlazeFeatherOC]

Yes, I noticed this. Quite odd, I wonder what this means....
Probably nothing, Haha.

 

[marc00077]

Where's the question?

 

[loco365]

9.9 Sysnand

There's your problem, dear. It simply does not work.

 

[Deleted User]

Where's the question?

I actually thought that to myself, as well!

 

[BlazeFeatherOC]

I actually thought that to myself, as well!

Me too!

 

[Deleted User]

There's your problem, dear.

I'm just pointing out that the old FBI (I used 1.4.9) returned the AM error instead of the MODULE_NN_OS error.
I did still use 9.9 when I was on 1.4.9.

I know it might not work anytime soon, but it's something that's worth pointing out...

 

[BlazeFeatherOC]

Does that mean it no longer require AM services?

 

[Deleted User]

Does that mean it no longer require AM services?

I dunno... Something's not right about this.

--------------------- MERGED ---------------------------

I've just been digging around in the source code of 1.4.12, and found that MODULE_AM is actually now MODULE_NN_AM, but was never called when I tried to install BigBlueMenu.cia.

 

[BlazeFeatherOC]

Hmm, ok.

 

[Piluvr]

so did the app install?

 

[Deleted User]

so did the app install?

No, it didn't. This probably won't amount to anything anyway, since you need ARM9 to bypass signature checks in order to play the apps.

 

[Intronaut]

Legit CIAs have to be a priority against normal CIAs. In the first case you only need access to the AM:NET service to install them (this means a arm11 kernel exploit). The second case require arm 11 kernel access to install CIAs + arm9 kernel access to patch signature checks

 

[Suiginou]

I'm guessing FBI 1.4.12 was built with a newer version of ctrulib. Here's what's happening:

• ctrulib now tries to fall back the am ports in following order: am:net, am:u, am:sys, am:app, in descending order of privileges. Old ctrulib (before Aug 18) would just try am:net and am:u.
• The Home Menu has access to am:sys.
• smealum's new homebrew launcher appears to take over the Home Menu.
• Thus, FBI now finds an am handle through the ctrulib function amInit().
• am:sys does not have access to the required commands to install CIAs, meaning FBI just fails at a different place. Either am:net or am:u is required to install CIA files.

 

[Deleted User]

I'm guessing FBI 1.4.12 was built with a newer version of ctrulib. Here's what's happening:

• ctrulib now tries to fall back the am ports in following order: am:net, am:u, am:sys, am:app, in descending order of privileges. Old ctrulib (before Aug 18) would just try am:net and am:u.
• The Home Menu has access to am:sys.
• smealum's new homebrew launcher appears to take over the Home Menu.
• Thus, FBI now finds an am handle through the ctrulib function amInit().
• am:sys does not have access to the required commands to install CIAs, meaning FBI just fails at a different place. Either am:net or am:u is required to install CIA files.

Well, I guess this sums it all up, then!

 

[Deleted User]

I'm guessing FBI 1.4.12 was built with a newer version of ctrulib. Here's what's happening:

• ctrulib now tries to fall back the am ports in following order: am:net, am:u, am:sys, am:app, in descending order of privileges. Old ctrulib (before Aug 18) would just try am:net and am:u.
• The Home Menu has access to am:sys.
• smealum's new homebrew launcher appears to take over the Home Menu.
• Thus, FBI now finds an am handle through the ctrulib function amInit().
• am:sys does not have access to the required commands to install CIAs, meaning FBI just fails at a different place. Either am:net or am:u is required to install CIA files.

This is correct. Couldn't have said it better myself.

 

[Deleted User]

This is correct. Couldn't have said it better myself.

So, we can install legit cias on 9.9?

 

[Piluvr]

So, we can install legit cias on 9.9?

no.

 

[fmkid]

...

 

[Deleted User]

no.

Well, Looks like I'll need to wait and see what's to come next!!